STMicroelectronics STEVAL-ILL090V1

Overview

STEVAL-ILL090V1 from STMicroelectronics is an automotive LED lighting evaluation board built around the ALED8102SXTTR 8-channel LED driver and STM8AL3L68T microcontroller, supporting dual-mode operation (manual/demonstration), RGB ambient lighting with fade control, and motorcycle rear light simulation with brake/turn signaling - validated for 12 V DC and USB-powered operation.

For engineers reviewing the STEVAL-ILL090V1 datasheet, STEVAL-ILL090V1 pinout, STEVAL-ILL090V1 application, or STEVAL-ILL090V1 equivalent, this board enables rapid validation of ALED8102SXTTR-based LED driver architectures, switch-controlled lighting sequences, fade timing behavior, and automotive-grade RGB + dual-orange/red LED configuration management under real-world power and user-interface conditions.

Technical Context

The board implements two independent lighting scenarios via hardware switch selection (SW2): one drives three RGB LEDs with per-channel brightness and global fade control using SW1 rotary encoder and FADE/SEL switches; the other configures two orange LED strips (left/right turn) and a central red LED circle (position/stop), where SW1 rotation selects arrow direction and STOP switch triggers high-intensity brake mode.

Control logic resides in the STM8AL3L68T MCU, which directly interfaces the ALED8102SXTTR via dedicated control lines - enabling real-time channel enable/disable, current setting, and PWM timing modulation without external host communication; all user inputs are debounced and state-managed onboard with automatic timeout-driven demo mode entry after ~30 s of inactivity.

Key Specifications

Availability

STEVAL-ILL090V1 is available at Aetrix Electronics and suitable for automotive interior lighting prototyping, motorcycle lighting system validation, and LED driver IC functional testing requiring stable component supply and documented reference design traceability.

Supply support for STEVAL-ILL090V1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal devices for automotive, industrial, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate specific IC functionalities in realistic use cases, accelerating customer design-in and reducing time-to-prototype for lighting, power, and sensing subsystems.

FAQ

What power sources does the STEVAL-ILL090V1 support?

The board accepts either 12 V DC input through terminal block J2 or 5 V USB power via the mini-B connector. Internal circuitry automatically selects the active source and includes reverse-polarity protection on the 12 V input path. No manual switching or external regulators are required for either supply mode.

How does the SW1 rotary switch function in RGB mode?

In RGB ambient lighting mode, rotating SW1 clockwise or counterclockwise adjusts the brightness level of the currently selected RGB channel (indicated by a short flash). When all three RGB channels flash simultaneously, global brightness is active - SW1 then controls overall intensity rather than individual channels.

Can the motorcycle rear light scenario simulate both turn signals and brake lights simultaneously?

No - the rear light scenario operates in mutually exclusive states: left or right turn indication (via SW1 rotation), position light (red circle at medium intensity), or brake light (red circle at high intensity when STOP is pressed). The design prevents concurrent turn+brake activation to reflect real-world automotive lamp regulations and wiring constraints.

Is firmware update or reprogramming supported on the STM8AL3L68T?

The STM8AL3L68T is pre-programmed with fixed lighting control firmware and lacks exposed SWIM debug headers or bootloader interface on this board. Reprogramming requires desoldering the MCU or using ST-LINK/V2 with custom adapter - not intended for field updates. Functionality is fully operational out-of-box without host PC interaction.